LA8519M Datasheet, PDF (18/29 Pages) Sanyo Semicon Device – I/O Switch/Voice Signal-Processing IC for Cordless Telephones

LA8519M
• Anti-sidetone network
The LA8519M can switch between two anti-sidetone networks, one for the near terminal and one for the far
terminal, depending on the circuit current. (See figure 1 for the connections used.) The switching point can be
changed by connecting PADC (pin 34) through a resistor to either ground or S-V_CC (pin 47).
If only one anti-sidetone network is used, short pin 51 to pin 52 as shown in figure 2. (The component values
shown are for reference purposes only.)
Line
6.2kΩ
0.01µF
1.5kΩ
11kΩ
3.3kΩ
Tr
82Ω
82Ω
8.2Ω
+
620Ω
48
47
VL S-VCC
51Ω
49 TOI
50 TOO
51 BN1
LA8519M
52 BN2
Figure 2
A13124
• Line voltage VL DC characteristics when V_CC is not applied (Values shown are for reference purposes only.)
BN
82Ω
+
+
Load
620Ω
48
47
46
VL S-VCC VSP
51Ω
3.3kΩ
Tr
49 TOI
82Ω
LA8519M
50 TOO
8.2Ω
A13125
The slope of the DC characteristics when V_CC is not applied can be increased without changing the DC
characteristics when V_CC is applied by applying a load to V_SP (pin 46).
No. 6471-18/29